2011-04-28 19:36:07 +02:00
|
|
|
/*
|
|
|
|
* CPUIdle support code for SH-Mobile ARM
|
|
|
|
*
|
|
|
|
* Copyright (C) 2011 Magnus Damm
|
|
|
|
*
|
|
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
|
|
* for more details.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/pm.h>
|
|
|
|
#include <linux/cpuidle.h>
|
|
|
|
#include <linux/suspend.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/err.h>
|
|
|
|
#include <asm/system.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
|
|
|
|
static void shmobile_enter_wfi(void)
|
|
|
|
{
|
|
|
|
cpu_do_idle();
|
|
|
|
}
|
|
|
|
|
|
|
|
void (*shmobile_cpuidle_modes[CPUIDLE_STATE_MAX])(void) = {
|
|
|
|
shmobile_enter_wfi, /* regular sleep mode */
|
|
|
|
};
|
|
|
|
|
|
|
|
static int shmobile_cpuidle_enter(struct cpuidle_device *dev,
|
2011-11-11 06:01:30 +01:00
|
|
|
struct cpuidle_driver *drv,
|
|
|
|
int index)
|
2011-04-28 19:36:07 +02:00
|
|
|
{
|
|
|
|
ktime_t before, after;
|
|
|
|
|
|
|
|
before = ktime_get();
|
|
|
|
|
|
|
|
local_irq_disable();
|
|
|
|
local_fiq_disable();
|
|
|
|
|
2011-11-11 06:01:30 +01:00
|
|
|
shmobile_cpuidle_modes[index]();
|
2011-04-28 19:36:07 +02:00
|
|
|
|
|
|
|
local_irq_enable();
|
|
|
|
local_fiq_enable();
|
|
|
|
|
|
|
|
after = ktime_get();
|
2011-11-11 06:01:30 +01:00
|
|
|
dev->last_residency = ktime_to_ns(ktime_sub(after, before)) >> 10;
|
|
|
|
|
|
|
|
return index;
|
2011-04-28 19:36:07 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct cpuidle_device shmobile_cpuidle_dev;
|
|
|
|
static struct cpuidle_driver shmobile_cpuidle_driver = {
|
|
|
|
.name = "shmobile_cpuidle",
|
|
|
|
.owner = THIS_MODULE,
|
2011-11-11 06:01:30 +01:00
|
|
|
.states[0] = {
|
|
|
|
.name = "C1",
|
|
|
|
.desc = "WFI",
|
|
|
|
.exit_latency = 1,
|
|
|
|
.target_residency = 1 * 2,
|
|
|
|
.flags = CPUIDLE_FLAG_TIME_VALID,
|
|
|
|
},
|
|
|
|
.safe_state_index = 0, /* C1 */
|
|
|
|
.state_count = 1,
|
2011-04-28 19:36:07 +02:00
|
|
|
};
|
|
|
|
|
2011-11-11 06:01:30 +01:00
|
|
|
void (*shmobile_cpuidle_setup)(struct cpuidle_driver *drv);
|
2011-04-28 19:36:07 +02:00
|
|
|
|
|
|
|
static int shmobile_cpuidle_init(void)
|
|
|
|
{
|
|
|
|
struct cpuidle_device *dev = &shmobile_cpuidle_dev;
|
2011-11-11 06:01:30 +01:00
|
|
|
struct cpuidle_driver *drv = &shmobile_cpuidle_driver;
|
2011-04-28 19:36:07 +02:00
|
|
|
int i;
|
|
|
|
|
2011-11-11 06:01:30 +01:00
|
|
|
for (i = 0; i < CPUIDLE_STATE_MAX; i++)
|
|
|
|
drv->states[i].enter = shmobile_cpuidle_enter;
|
2011-04-28 19:36:07 +02:00
|
|
|
|
|
|
|
if (shmobile_cpuidle_setup)
|
2011-11-11 06:01:30 +01:00
|
|
|
shmobile_cpuidle_setup(drv);
|
|
|
|
|
|
|
|
cpuidle_register_driver(drv);
|
2011-04-28 19:36:07 +02:00
|
|
|
|
2011-11-11 06:01:30 +01:00
|
|
|
dev->state_count = drv->state_count;
|
2011-04-28 19:36:07 +02:00
|
|
|
cpuidle_register_device(dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
late_initcall(shmobile_cpuidle_init);
|